A266824 Number of nX3 arrays containing 3 copies of 0..n-1 with no element 1 greater than its north, west, northwest or southwest neighbor modulo n and the upper left element equal to 0.

1, 0, 1, 16, 3335, 2320408, 2535597415, 4417318594838

Offset

1,4

Comments

Column 3 of A266825.

Links

Table of n, a(n) for n=1..8.

Example

Some solutions for n=4
..0..3..2....0..3..2....0..2..1....0..3..2....0..3..2....0..2..1....0..3..1
..3..2..1....0..3..1....3..2..0....3..2..1....0..3..1....3..2..1....0..2..1
..2..1..0....0..2..1....3..1..0....3..1..0....3..2..1....3..2..0....3..2..1
..1..0..3....3..2..1....2..1..3....2..1..0....2..1..0....3..1..0....3..2..0

Crossrefs

Cf. A266825.

Sequence in context: A051551 A307930 A289703 * A249599 A364483 A281821

Adjacent sequences: A266821 A266822 A266823 * A266825 A266826 A266827

Keyword

nonn

Author

R. H. Hardin, Jan 04 2016

Status

approved